Do you have your heart set on tubes? The older Classe CA-200,
CA-300, CA-400 amps have incredible synergy with the 10t. I
have not heard the newer Classe CA-201/301/401 amps with the
10t but my guess would be a similar synergy. The 10t really
seems to shine with high-watt SS. I also liked the 10t being
driven by ML 336. I thought it sounded a little sterile with
Krell FPB-300. I thought it sounded a little lumpy with ARC
CL150s. Great speakers those 10ts. The 20t is not worth
double the price of the 10t. I'm not even sure they sound
better. The 10t is the true classic of the Aerial line.